Method of fabricating semiconductor package

ABSTRACT

A semiconductor package includes: a redistribution substrate; a semiconductor chip on the redistribution substrate; and an external terminal on a bottom surface of the redistribution substrate, wherein the redistribution substrate comprises: a first insulating layer including a first opening; a second insulating layer on the first insulating layer and including a second opening, wherein the second opening is positioned in the first opening in a plan view; a first barrier metal layer disposed along a sidewall of the first opening and along a sidewall of the second opening; a first redistribution conductive pattern on the first barrier metal layer; a third insulating layer on a bottom surface of the first insulating layer; and a pad penetrating the third insulating layer and electrically connecting to the first redistribution conductive pattern, wherein the external terminal is provided on the pad, wherein the second insulating layer at least partially covers a chip pad of the semiconductor chip, and the second opening at least partially exposes the chip pad, wherein, inside the second insulating layer, the first barrier metal layer is in contact with the chip pad through the second opening, and wherein the first redistribution conductive pattern has a surface roughness including protrusions extending in a range of from about 0.01 μm to about 0.5 μm, and the first insulating layer has a surface roughness smaller than the surface roughness of the first redistribution conductive pattern.

CROSS-REFERENCE TO RELATED APPLICATIONS

This U.S. non-provisional patent application is a continuationapplication of U.S. patent application Ser. No. 15/867,075, titledMETHOD OF FABRICATING SEMICONDUCTOR PACKAGE and filed on Jan. 10, 2018,which, in turn, claims priority under 35 U.S.C. § 119 to Korean PatentApplication No. 10-2017-0097251, filed on Jul. 31, 2017 in the KoreanIntellectual Property Office, the disclosures of which are incorporatedby reference herein in their entireties.

TECHNICAL FIELD

Exemplary embodiments of the present inventive concept relate to amethod of fabricating a semiconductor package, and more particularly toa semiconductor package.

DISCUSSION OF RELATED ART

A semiconductor package may be included in an integrated circuit chipfor use in electronic products. A semiconductor package may include asemiconductor chip, a printed circuit board (PCB), and a plurality ofbonding wires or bumps. The semiconductor chip may be mounted on theprinted circuit board (PCB). The plurality of bonding wires or bumps mayelectrically connect the semiconductor chip to the printed circuit board(PCB). Electronic products may have relatively fast performance,relatively short response times, and a relatively compact size. A waferlevel package and a panel level package may include the semiconductorpackage described above.

SUMMARY

Exemplary embodiments of the present inventive concept provide a methodof fabricating a semiconductor package having an increased lifetime witha reduced failure rate.

Exemplary embodiments of the present inventive concept provide a methodof fabricating a semiconductor package, which may increase an adhesiveforce between an insulating layer and a redistribution line.

Some exemplary embodiments of the present inventive concept provide amethod of fabricating a semiconductor package. The method includesforming a preliminary first insulating layer including a first opening.The method includes curing the preliminary first insulating layer toform a first insulating layer. The method includes forming a preliminarysecond insulating layer on the first preliminary insulating layer atleast partially filling the first opening. The method includes forming asecond opening in the preliminary second insulating layer at leastpartially overlapping the first opening, in which a sidewall of thefirst opening is at least partially exposed during forming the secondopening. The method includes curing the preliminary second insulatinglayer to form a second insulating layer. The method includes forming abarrier metal layer along the sidewall of the first opening and along asidewall of the second opening. The method includes forming aredistribution conductive pattern on the barrier metal layer; andperforming a planarization process to at least partially expose thesecond insulating layer.

Some exemplary embodiments of the present inventive concept provide amethod of manufacturing a semiconductor package. The method includesforming on a semiconductor chip a first insulating layer including afirst opening at least partially exposing the semiconductor chip. Themethod includes forming a second insulating layer on the firstinsulating layer at least partially filling the first opening. Themethod includes forming a second opening in the second insulating layerat least partially overlapping the first opening, in which a sidewall ofthe first opening is at least partially exposed during forming thesecond opening. The method includes sequentially forming a barrier metallayer and a redistribution conductive pattern in the first and secondopenings. The method includes performing a planarization process to atleast partially expose the second insulating layer. The step of formingthe second opening may is performed under a condition that the firstinsulating layer is in a cured state and the second insulating layer isin a non-cured state.

Some exemplary embodiments of the present inventive concept provide amethod of manufacturing a semiconductor package. The method includesforming a redistribution substrate; and providing a semiconductor chipon the redistribution substrate electrically connecting thesemiconductor chip to the redistribution substrate. The step of formingthe redistribution substrate includes forming a first insulating layeron a carrier substrate including a first opening exposing at least aportion of the carrier substrate. The step of forming the redistributionsubstrate includes forming a second insulating layer on the firstinsulating layer filling at least a portion of the first opening. Thestep of forming the redistribution substrate includes forming a secondopening in the second insulating layer, in which a sidewall of the firstopening is at least partially exposed during forming the second opening.The step of forming the redistribution substrate includes sequentiallyforming a barrier metal layer and a redistribution conductive pattern inthe first and second openings. The step of forming the redistributionsubstrate includes performing a planarization process to at leastpartially expose the second insulating layer. The step of forming thesecond opening is performed under a condition that the first insulatinglayer is in a cured state and the second insulating layer is in anon-cured state.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features of the present inventive concept willbecome more apparent by describing in detail exemplary embodimentsthereof, with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view illustrating a semiconductor packageaccording to an exemplary embodiment of the present inventive concept;

FIG. 2A is an enlarged view of Section A of FIG. 1 according to anexemplary embodiment of the present inventive concept;

FIG. 2B is an enlarged view of Section B of FIG. 2A according to anexemplary embodiment of the present inventive concept;

FIG. 3 is a cross-sectional view illustrating a semiconductor packageaccording to an exemplary embodiment of the present inventive concept;

FIGS. 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4I, 4J, 4K and 4L arecross-sectional views illustrating a method of fabricating asemiconductor package according to an exemplary embodiment of thepresent inventive concept; and

FIGS. 5A, 5B, 5C, 5D, 5E, 5F, 5G, 5H and 5I are cross-sectional viewsillustrating a method of manufacturing a semiconductor package accordingto an exemplary embodiment of the present inventive concept.

DETAILED DESCRIPTION

Exemplary embodiments of the present inventive concept will be discussedin more detail below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view illustrating a semiconductor packageaccording to an exemplary embodiment of the present inventive concept.FIG. 2A is an enlarged view illustrating Section A of FIG. 1 accordingto an exemplary embodiment of the present inventive concept. FIG. 2B isan enlarged view illustrating Section B of FIG. 2A according to anexemplary embodiment of the present inventive concept.

Referring to FIGS. 1, 2A, and 2B, a semiconductor package 1 according toan exemplary embodiment of the present inventive concept may include asemiconductor chip 100, a molding layer 150, a redistribution substrate200, and an external terminal 300.

The semiconductor chip 100 may be disposed on a top surface 2112 of theredistribution substrate 200. The top surface 2112 of the redistributionsubstrate 200 may face the semiconductor chip 100. The semiconductorchip 100 may include chip pads 110 and a passivation layer 120. The chippads 110 and the passivation layer 120 may be disposed on a bottomsurface of the semiconductor chip 100. The bottom surface of thesemiconductor chip 100 may face the redistribution substrate 200. Thepassivation layer 120 may at least partially cover each of the chip pads110 and the bottom surface of the semiconductor chip 100. Thepassivation layer 120 may include holes. The holes may at leastpartially expose the chip pads 110. The semiconductor chip 100 mayinclude silicon (Si).

The molding layer 150 may be disposed on the top surface 2112 of theredistribution substrate 200. The molding layer 150 may cover (e.g., atleast partially cover) the semiconductor chip 100. For example, themolding layer 150 may at least partially cover top and side surfaces ofthe semiconductor chip 100. The top surface of the semiconductor chip100 may be spaced apart in a first direction D1 from the bottom surfaceof the semiconductor chip 100. The molding layer 150 may include, forexample, an epoxy polymer. The first direction D1 may be parallel to avertical direction (e.g., an “up-and-down” direction in across-sectional view).

The redistribution substrate 200 may be disposed on the bottom surfaceof the semiconductor chip 100. The redistribution substrate 200 may bedisposed on a bottom surface of the molding layer 150. The bottomsurface of the molding layer 150 may face the redistribution substrate200. The redistribution substrate 200 may have a thickness less than athickness of the semiconductor chip 100. The redistribution substrate200 may include at least one insulation section. In some exemplaryembodiments of the present inventive concept, the redistributionsubstrate 200 may include a first insulation section 210 and a secondinsulation section 220. The first insulation section 210 may be disposedon the second insulation section 220. The redistribution substrate 200may further include a third insulation section 230. The secondinsulation section 220 may be disposed between the first insulationsection 210 and the third insulation section 230.

The first insulation section 210 may include a first insulating layer211, a second insulating layer 212, a first redistribution conductivepattern 214, and a first barrier metal layer 213. The second insulationsection 220 may include a third insulating layer 221, a fourthinsulating layer 222, a second redistribution conductive pattern 224,and a second barrier metal layer 223.

The first insulating layer 211 may be disposed on the second insulatinglayer 212. The first and second insulating layers 211 and 212 may eachinclude a curable material. The first and second insulating layers 211and 212 may be cured, for example, by heat or light. The curablematerial may include a polyamide-based polymer and/or an inorganicmaterial such as silicon oxide, silicon nitride, or silicon oxynitride;however, exemplary embodiments of the present inventive concept are notlimited thereto. For example, the curable material may include one ormore of photosensitive polyimide (PSPI), polybenzoxazole (PBO), phenolicpolymer, benzocyclobutene (BCB) polymer, or epoxy polymer. In someexemplary embodiments of the present inventive concept, the first andsecond insulating layers 211 and 212 may each include a same curablematerial as each other; however, exemplary embodiments of the presentinventive concept are not limited thereto. For example, the first andsecond insulating layers 211 and 212 may include different curablematerials from each other.

The first insulating layer 211 may be disposed on the bottom surface ofthe semiconductor chip 100. For example, the first insulating layer 211may at least partially cover each of a bottom surface of the chip pad110, the bottom surface of the molding layer 150, and a bottom surfaceof the passivation layer 120. The first insulating layer 211 may includethe top surface 2112 and a bottom surface 2111. The top surface 2112 andthe bottom surface 2111 of the first insulating layer 211 may face eachother. In some exemplary embodiments of the present inventive concept,the top surface 2112 of the first insulating layer 211 may be a topsurface of the redistribution substrate 200.

Referring to FIGS. 2A and 4D (described in more detail below), the firstinsulating layer 211 may include a first opening OP1. The first openingOP1 may penetrate the first insulating layer 211. The first opening OP1may at least partially expose the chip pad 110. The first opening OP1may also at least partially expose a first sidewall 2113 of the firstinsulating layer 211. The first insulating layer 211 may include aplurality of first openings OP1.

The second insulating layer 212 may be disposed on the bottom surface2111 of the first insulating layer 211. The first insulating layer 211may be positioned between the semiconductor chip 100 and the secondinsulating layer 212. In some exemplary embodiments of the presentinventive concept, the second insulating layer 212 may have a bottomsurface 2121. The bottom surface 2121 of the second insulating layer 212may be in direct contact with a top surface of the third insulatinglayer 221.

The second insulating layer 212 may include a second opening OP2. Thesecond opening OP2 may penetrate the second insulating layer 212.Referring to FIG. 4F (described in more detail below), the secondopening OP2 may expose at least a portion of the bottom surface 2111 ofthe first insulating layer 211. The second opening OP2 may expose atleast a portion of a second sidewall 2123 of the second insulating layer212. At least a portion of the second opening OP2 may vertically overlapwith the first opening OP1. The second opening OP2 may have a width W2greater than a width W1 of the first opening OP1. For example, whenviewed in plan, the first opening OP1 may be positioned in the secondopening OP2. The second insulating layer 212 may include a plurality ofsecond openings OP2. In some exemplary embodiments of the presentinventive concept, the term “width” may refer to a length in a seconddirection D2. The second direction D2 may be perpendicular to the firstdirection D1 (e.g., “a side-to-side” direction in a cross-sectionalview).

The first and second openings OP1 and OP2 may form a single opening OP.The first and second openings OP1 and OP2 may be formed at substantiallya same time. For example, a dual damascene process may be performed tosimultaneously form the first and second openings OP1 and OP2respectively in the first and second insulating layers 211 and 212. Theprocess thereof will be discussed in more detail below.

The first barrier metal layer 213 may be provided between the firstinsulating layer 211 and the first redistribution conductive pattern214. The first barrier metal layer 213 may be provided between thesecond insulating layer 212 and the first redistribution conductivepattern 214. For example, the first barrier metal layer 213 may beformed between the first redistribution conductive pattern 214 and thefirst sidewall 2113 of the first insulating layer 211. The first barriermetal layer 213 may also be formed between the first redistributionconductive pattern 214 and the second sidewall 2123 of the secondinsulating layer 212.

The first barrier metal layer 213 may be provided on a region at leastpartially exposed to the first and second openings OP1 and OP2. Forexample, the first barrier metal layer 213 may be provided on the firstand second sidewalls 2113 and 2123 of the first insulating layer 211 andthe second insulating layer 212, respectively. The first barrier metallayer 213 may be provided on a lower portion of the first opening OP1.For example, the first barrier metal layer 213 may be provided on thechip pad 110, at least partially exposed by the first opening OP1, ofthe semiconductor chip 100. The first barrier metal layer 213 may beprovided on the bottom surface 2111 at least partially exposed to thesecond opening OP2.

The first barrier metal layer 213 may include a metallic material. Insome exemplary embodiments of the present inventive concept, the firstbarrier metal layer 213 may be formed, for example, by depositing ametallic material on the region at least partially exposed to the firstand second openings OP1 and OP2 and on the bottom surface 2121 of thesecond insulating layer 212. For example, the first barrier metal layer213 may include at least one of Ta, TaN, TaSiN, Ti, TiN, TiSiN, W, orWN. The first barrier metal layer 213 may have a thickness in a range offrom about 5 Å to about 50 Å.

The first redistribution conductive pattern 214 may be provided on thefirst barrier metal layer 213. The first redistribution conductivepattern 214 may include a conductive material. For example, the firstredistribution conductive pattern 214 may include copper (Cu), aluminum(Al), or a copper alloy. The copper alloy may refer to copper (Cu) mixedwith a relatively small amount of C, Ag, Co, Ta, In, Sn, Zn, Mn, Ti, Mg,Cr, Ge, Sr, Pt, Mg, Al, or Zr. The first redistribution conductivepattern 214 may be provided in the first and second insulating layers211 and 212. The first redistribution conductive pattern 214 may beelectrically connected to the chip pad 110 and/or to the secondredistribution conductive pattern 224.

The first redistribution conductive pattern 214 may include a topsurface 2142 and a bottom surface 2141. The top surface 2142 and thebottom surface 2141 of the first redistribution conductive pattern 214may face each other. The bottom surface 2141 of the first redistributionconductive pattern 214 may have a width greater than a width of the topsurface 2142 of the first redistribution conductive pattern 214. The topsurface 2141 of the first redistribution conductive pattern 214 maypartially vertically overlap the bottom surface 2142 of the firstredistribution conductive pattern 214.

The bottom surface 2141 of the first redistribution conductive pattern214 may be positioned at substantially the same level as the bottomsurface 2121 of the second insulating layer 212. The bottom surface 2141of the first redistribution conductive pattern 214 may be substantiallycoplanar with the bottom surface 2121 of the second insulating layer212. For example, the bottom surface 2141 of the first redistributionconductive pattern 214 and the bottom surface 2121 of the secondinsulating layer 212 may be positioned on substantially the same plane.In such a configuration, a vertical distance H2 between the lowersurface 2121 of the second insulating layer 2121 and the lower surface2111 of the first insulating layer 2111 may be substantially the same asa vertical distance H1 between the lower surface 2141 of the firstredistribution conductive pattern 214 and the lower surface 2111 of thefirst insulating layer 211.

Referring to FIG. 2B, the bottom surface 2141 of the firstredistribution conductive pattern 214 may have a surface roughnessgreater than a surface roughness of the bottom surface 2121 of thesecond insulating layer 212. The bottom surface 2141 of the firstredistribution conductive pattern 214 may have a surface roughnessincluding protrusions extending in a range of from about 0.01 μm to 0.5μm. The bottom surface 2141 of the first redistribution conductivepattern 214 may have a surface roughness including protrusions extendingin a range of from about 0.01 μm to about 0.086 μm. The bottom surface2121 of the second insulating layer 212 may have a surface roughnessincluding protrusions extending in a range of from about 0.01 μm toabout 0.5 μm. The bottom surface 2121 of the second insulating layer 212may have a surface roughness including protrusions extending in a rangeof from about 0.01 μm to about 0.086 μm. Accordingly, an adhesive forcemay be greater between the bottom surface 2141 of the firstredistribution conductive pattern 214 and the third insulating layer 221than between the bottom surface 2121 of the second insulating layer 212and the third insulating layer 221. Thus, an increased heterojunctionmay be provided between the first redistribution conductive pattern 214and the third insulating layer 221. The term “heterojunction” may referto a junction between components having different materials from eachother.

The first redistribution conductive pattern 214 may include a steppedsurface 2144. The stepped surface 2144 may be disposed between the topsurface 2142 and the bottom surface 2141. The first redistributionconductive pattern 214 may include a first side surface 2143 and asecond side surface 2145. The first side surface 2143 may connect thetop and stepped surfaces 2142 and 2144 to each other. The second sidesurface 2145 may connect the bottom and stepped surfaces 2141 and 2144to each other. The top, bottom, and stepped surfaces 2142, 2141, and2144 of the first redistribution conductive pattern 214 may besubstantially parallel to each other.

The second side surface 2145 may have a width greater than a width ofthe first side surface 2143. The widths of the first and second sidesurfaces 2143 and 2145 may gradually increase from the top surface 2142to the bottom surface 2141 of the first redistribution conductivepattern 214. In some exemplary embodiments of the present inventiveconcept, the first and second side surfaces 2143 and 2145 may beinclined with respect to the stepped surface 2144. In some exemplaryembodiments of the present inventive concept, the first and second sidesurfaces 2143 and 2145 may be substantially perpendicular to the steppedsurface 2144. The first and second side surfaces 2143 and 2145 may besubstantially parallel to each other; however, exemplary embodiments ofthe present inventive concept are not limited thereto.

The first and second insulating layers 211 and 212 may have a thermalexpansion coefficient. The thermal expansion coefficient of the firstand second insulating layers 211 and 212 may be different from a thermalexpansion coefficient of the first redistribution conductive pattern214. Thus, a thermal stress may be produced between the firstredistribution conductive pattern 214 and the first and secondinsulating layers 211 and 212. When the first barrier metal layer 213 isnot provided between an insulating layer and the first side wall 2143 ofthe first redistribution conductive pattern 214 and/or between aninsulating layer and the second side wall 2145 of the firstredistribution conductive pattern 214, the thermal stress may form anoxidation layer on the first side surface 2143 and/or the second sidesurface 2145 of the first redistribution conductive pattern 214. Theoxidation layer may decrease an adhesive force between the insulatinglayer and the first side surface 2143 of the first redistributionconductive pattern 214 and/or between the insulating layer and thesecond side surface 2145 of the first redistribution conductive pattern214. Accordingly, the first side surface 2143 and/or the second sidesurface 2145 of the first redistribution conductive pattern 214 may atleast partially peel off the insulating layer. Thus, a semiconductorpackage may have a reduced lifetime or may be damaged.

According to some exemplary embodiments of the present inventiveconcept, the semiconductor package 1 may include the first barrier metallayer 213 between the first insulating layer 211 and the first sidesurface 2143 of the first redistribution conductive pattern 214. Thesemiconductor package 1 may include the first barrier metal layer 213between the second insulating layer 212 and the second side surface 2145of the first redistribution conductive pattern 214. The first barriermetal layer 213 may reduce or prevent the first and second side surfaces2143 and 2145 of the first redistribution conductive pattern 214 frompeeling, for example, as a result of thermal stress. Thus, thesemiconductor package 1 may have an increased lifetime and may lesslikely to suffer from damages.

The second insulation section 220 may include the third insulating layer221, the fourth insulating layer 222, the second redistributionconductive pattern 224, and the second barrier metal layer 223. Thesecond insulation section 220 may have substantially the sameconfiguration as the first insulation section 210 described above. Thus,a discussion of the second insulation section 220 below may focus ondifferences between the second insulation section 220 and the firstinsulation section 210.

The third insulating layer 221 may be provided on the bottom surface2121 of the second insulating layer 212. The third insulating layer 221may include a third opening OP3. The third opening OP3 may penetrate thethird insulating layer 221. The third insulating layer 221 may include aplurality of third openings OP3. The third opening OP3 may at leastpartially expose the first redistribution conductive pattern 214. Forexample, the third opening OP3 may partially expose the bottom surface2141 of the first redistribution conductive pattern 214. The thirdinsulating layer 221 may have substantially the same configuration asthat of the first insulating layer 211.

The second redistribution conductive pattern 224 may be positionedbetween the third and fourth insulating layers 221 and 222. The secondredistribution conductive pattern 224 may be electrically coupled to thefirst redistribution conductive pattern 214. The phrase “coupled to” mayinclude “directly coupled to” or “indirectly coupled through othercomponent(s) to.”

The third insulation section 230 may include a fifth insulating layer231, a third barrier metal layer 233, and a third redistributionconductive pattern 234. The third insulation section 230 may include asingle insulating layer. The third redistribution conductive pattern 234may be disposed on the third barrier metal layer 233.

The third barrier metal layer 233 may be positioned between the fifthinsulating layer 231 and the third redistribution conductive pattern234. The third redistribution conductive pattern 234 may have astructure protruding from the fifth insulating layer 231. For example,the third barrier metal layer 233 might not be formed on a portion of aside surface of the third redistribution conductive pattern 234. Thethird redistribution conductive pattern 234 may be electricallyconnected to the second redistribution conductive pattern 224, forexample, through the third barrier metal layer 233.

A plurality of the external terminals 300 may be provided on a bottomsurface of the redistribution substrate 200. For example, the externalterminals 300 may be provided on a plurality of the third redistributionconductive patterns 234. Accordingly, the redistribution substrate 200may be positioned between the external terminals 300 and thesemiconductor chip 100. The external terminals 300 may be electricallyconnected to the third redistribution conductive patterns 234. Thus, theexternal terminals 300 may be electrically coupled to the semiconductorchip 100, for example, through each of the first, second, and thirdredistribution conductive patterns 214, 224, and 234.

Each of the external terminals 300 may have a solder ball shape;however, exemplary embodiments of the present invention are not limitedthereto. One or more of the external terminals 300 may at leastpartially vertically overlap the semiconductor chip 100. Other ones ofthe external terminals 300 might not vertically overlap thesemiconductor chip 100. One or more of the external terminals 300 may atleast partially overlap the molding layer 150 in a plan view. In someexemplary embodiments of the present inventive concept, thesemiconductor package 1 may be a fan-out panel semiconductor package;however, exemplary embodiments of the present inventive concept are notlimited thereto.

FIG. 3 is a cross-sectional view illustrating a semiconductor packageaccording to an exemplary embodiment of the present inventive concept.Descriptions of components substantially the same as those of theexemplary embodiments of the present inventive concept discussed abovewith reference to FIGS. 1, 2A, and 2B may be omitted below.

Referring to FIG. 3, a semiconductor package 2 may include the firstsemiconductor chip 100, a second semiconductor chip 600, the firstmolding layer 150, a second molding layer 650, a connection substrate400, the first redistribution substrate 200, and a second redistributionsubstrate 500. The semiconductor package 2 may further include firstexternal terminals 300, second external terminals 550, and connectionterminals 450.

The first semiconductor chip 100 may be disposed on a top surface of thefirst redistribution substrate 200. The semiconductor package 2 mayinclude one or more first chip pads 110 and a first passivation layer.The one or more first chip pads 110 and the first passivation layer maybe provided on a bottom surface of the first semiconductor chip 100.

The connection substrate 400 may be disposed on the top surface of thefirst redistribution substrate 200. The connection substrate 400 may bepositioned between the first and second redistribution substrates 200and 500. The connection substrate 400 may at least partially surround aside surface of the first semiconductor chip 100 in a plan view. Theconnection substrate 400 may include an insertion opening 405. Theinsertion opening 405 may penetrate the connection substrate 400. Thefirst semiconductor chip 100 may be at least partially disposed in theinsertion opening 405. The insertion opening 405 may have a size greaterthan a size of the first semiconductor chip 100. Thus, a gap may beproduced between the connection substrate 400 and the firstsemiconductor chip 100.

The connection substrate 400 may include base layers 410 and aconductive connection member 420. In some exemplary embodiments of thepresent inventive concept, a printed circuit board (PCB) may be used asthe connection substrate 400. The base layers 410 may include anon-conductive material. For example, the base layers 410 may include acarbon-containing material (e.g., graphite or grapheme), a ceramic, or apolymer (e.g., polycarbonate, nylon, or high-density polyethylene(HDPE)).

The conductive connection member 420 may include first connection pads421, line patterns 424, second connection pads 423, and vias 422. Thefirst connection pads 421 may be formed on the first redistributionsubstrate 200. The first connection pads 421 may be electricallyconnected to the first redistribution conductive patterns 214. Thesecond connection pads 423 may be provided on a top surface of theconnection substrate 400. The vias 422 may at least partially penetratethe base layers 410. The line patterns 424 may be positioned betweeneach of the base layers 410. The line patterns 424 may be coupled to thevias 422. The line patterns 424 may be positioned between the first andsecond connection pads 421 and 423. The line patterns 424 may beelectrically connected to the first and second connection pads 421 and423, for example, through the vias 422. The conductive connection member420 may include copper, nickel, aluminum, gold, silver, stainless steel,or an alloy thereof. The first connection pads 421, the secondconnection pads 423, the vias 422, and the line patterns 424 may atleast partially vertically overlap each other.

The first redistribution substrate 200 may include at least oneinsulation section. In some exemplary embodiments of the presentinventive concept, the first redistribution substrate 200 may include afirst insulation section 210, a second insulation section 220, a thirdinsulation section 230. The first insulation section 210 may include afirst insulating layer 211, a second insulating layer 212, a firstbarrier metal layer 213, and a first redistribution conductive pattern214. The second insulation section 220 may include a third insulatinglayer 221, a fourth insulating layer 222, a second barrier metal layer223, and a second redistribution conductive pattern 224. The thirdinsulation section 230 may include a fifth insulating layer 231, a thirdbarrier metal layer 233, and a third redistribution conductive pattern234. A plurality of the first redistribution conductive patterns 214 mayeach be coupled to the first chip pads 110 and the first connection pads421.

The first external terminals 300 may be provided on a bottom surface ofthe first redistribution substrate 200. In some exemplary embodiments ofthe present inventive concept, the first external terminals 300 may beelectrically connected to a plurality of the third redistributionconductive patterns 234. Thus, the first external terminals 300 may beelectrically connected to the first chip pads 110 and the firstconnection pads 421.

The first molding layer 150 may be formed on the connection substrate400 and the first semiconductor chip 100. The first molding layer 150may be provided in the gap between the connection substrate 400 and thefirst semiconductor chip 100. The first molding layer 150 may include aplurality of openings. The plurality of openings in the first moldinglayer 150 may at least partially expose the second connection pads 423.

The connection terminals 450 may be formed on the plurality openings ofthe first molding layer 150. Thus, the connection terminals 450 may beelectrically coupled to the second connection pads 423, for example,through the plurality of openings of the first molding layer 150.

The second redistribution substrate 500 may be formed on a top surfaceof the first molding layer 150. The second redistribution substrate 500may include at least one insulation section. In some exemplaryembodiments of the present inventive concept, the second redistributionsubstrate 500 may include a fourth insulation section 510 and a fifthinsulation section 520. The fourth and fifth insulation sections 510 and520 may be formed to have substantially the same structure as astructure of the first and second insulation sections 210 and 220. Thefourth insulation section 510 may include redistribution conductivepatterns. The redistribution conductive patterns of the fourthinsulation section 510 may be coupled to the connection terminals 450.The fifth insulation section 520 may include redistribution conductivepatterns. The redistribution patterns of the fifth insulation section520 may be electrically coupled to each of the redistribution conductivepatterns of the fourth insulation section 510 and to the second externalterminals 550.

The second semiconductor chip 600 may be provided over the secondredistribution substrate 500. Second chip pads 610 may be provided on abottom surface of the second semiconductor chip 600.

The second external terminals 550 may be positioned between the secondsemiconductor chip 600 and the second redistribution substrate 500. Thesecond external terminals 550 may be electrically connected to each ofthe redistribution conductive patterns of the fifth insulation section520 and to the second chip pads 610.

The second molding layer 650 may at least partially cover the secondsemiconductor chip 600 and the second redistribution substrate 500. Thesecond molding layer 650 may include substantially a same material as amaterial of the first molding layer 150; however, exemplary embodimentsof the present invention are not limited thereto.

FIGS. 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4I, 4J, 4K and 4L arecross-sectional views illustrating a method of fabricating asemiconductor package according to an exemplary embodiment of thepresent inventive concept.

Referring to FIG. 4A, a support substrate 20 may be provided. Anadhesive layer 25 may be disposed on, for example, an upper surface ofthe support substrate 20. A plurality of semiconductor chips 100 may bedisposed on the support substrate 20. The semiconductor chips 100 may bearranged along the second direction D2. The semiconductor chips 100 maybe spaced apart from each other, for example, in the second directionD2. The adhesive layer 25 may adhere the semiconductor chip 100 to thesupport substrate 20. The semiconductor chips 100 may each include chippads 110 and a passivation layer 120 (see, e.g., FIGS. 1 and 4C). Thechip pads 110 and the passivation layer may face the support substrate20.

Referring to FIG. 4B, the molding layer 150 may be formed on the supportsubstrate 20. The molding layer 150 may at least partially cover thesemiconductor chips 100. For example, an insulating material may beprovided on the support substrate 20. The insulating material may atleast partially cover the semiconductor chips 100. Accordingly, themolding layer 150 may be provided on each of the support substrate 20and the semiconductor chips 100.

One of the semiconductor chips 100 is discussed in more detail belowregarding a method of fabricating a semiconductor package with referenceto FIGS. 4C to 4K. Referring to FIG. 4C, the support substrate 20 may beat least partially removed from each of the semiconductor chip 100 andthe molding layer 150. The removal of the support substrate 20 mayexpose a bottom surface of the semiconductor chip 100 and a bottomsurface of the molding layer 150. The semiconductor chip 100 and themolding layer 150 may be turned upside down, e.g., about 180 degrees.

After the semiconductor chip 100 and the molding layer 150 are turnedupside down, a preliminary first insulating layer 211′ may be formed onthe bottom surfaces of each of the semiconductor chip 100 and themolding layer 150. The preliminary first insulating layer 211′ may be ina non-cured state. For example, the non-cured preliminary firstinsulating layer 211′ may at least partially cover each of the chip pads110, the passivation layer 120, and the bottom surface of the moldinglayer 150. The preliminary first insulating layer 211′ may be formed,for example, using PECVD (Plasma Enhanced CVD), HDPCVD (High DensityPlasma CVD), APCVD (Atmospheric Pressure CVD), or spin coating.

Referring to FIG. 4D, the preliminary first insulating layer 211′ (see,e.g., FIG. 4C) may be provided. The preliminary first insulating layer211′ may include first openings OP1. The first openings OP1 of the firstinsulating layer 211′ may at least partially expose the semiconductorchip 100, for example, the chip pads 110 of the semiconductor chip 100.As an example, the first openings OP1 at least partially exposing thechip pads 110 may be formed in the preliminary first insulating layer211′. Accordingly, the preliminary first insulating layer 211′ includingthe first openings OP1 may be formed on the lower surface of thesemiconductor chip 100.

In some exemplary embodiments of the present inventive concept, thefirst openings OP1 may be formed, for example, by forming a first maskpattern on the preliminary first insulating layer 211′. The first maskpattern may be used as an etch mask to etch the preliminary firstinsulating layer 211′. The first openings OP1 may at least partiallyexpose each of a first sidewall 2113 of the preliminary first insulatinglayer 211′ and the chip pads 110 of the semiconductor chip 100.

The preliminary first insulating layer 211′ may be cured prior toforming the second openings OP2, which will be discussed in more detailbelow. In some exemplary embodiments of the present inventive concept,after the first openings OP1 are formed in the preliminary firstinsulating layer 211′, the preliminary first insulating layer 211′ maybe thermally or optically cured to form a first insulating layer 211.For example, the preliminary first insulating layer 211′ may be providedin a chamber. The chamber may have a temperature in a range of fromabout 150° C. to about 200° C. The preliminary first insulating layer211′ may be cooled to room temperature (e.g., about 25° C.) to obtainthe first insulating layer 211, which is cured.

Referring to FIG. 4E, a preliminary second insulating layer 212′ may beformed on a bottom surface 2111 of the first insulating layer 211. Thus,the first openings OP1 may be at least partially filled by thepreliminary second insulating layer 212′. The preliminary secondinsulating layer 212′ may be in a non-cured state. For example, thepreliminary second insulating layer 212′ may at least partially coverthe bottom surface 2111 of the first insulating layer 211 and at leastpartially fill the first openings OP1. The preliminary second insulatinglayer 212′ may be formed, for example, by using PECVD (Plasma EnhancedCVD), HDPCVD (High Density Plasma CVD), APCVD (Atmospheric PressureCVD), or spin coating.

Referring to FIG. 4F, the preliminary second insulating layer 212′ maybe provided. The preliminary second insulating layer 212′ may includesecond openings OP2. The second openings OP2 may at least partiallyoverlap corresponding first openings OP1. For example, the secondopenings OP2 may be formed by forming a second mask pattern on thepreliminary second insulating layer 212′ (see, e.g., FIG. 4E). Thesecond mask pattern may be used as an etch mask, for example, to etchthe preliminary second insulating layer 212′. The formation of thesecond openings OP2 may be performed, for example, when the firstinsulating layer 211 is in a cured state and the preliminary secondinsulating layer 212′ is in a non-cured state.

When the second opening OP2 is formed in the preliminary secondinsulating layer 212′, the preliminary second insulating layer 212′ maybe at least partially removed from inside the first opening OP1.Therefore, the first opening OP1 may be at least partially exposed onits sidewall. In some exemplary embodiments of the present inventiveconcept, the sidewall of the first opening OP1 may be in a positioncorresponding to a first sidewall 2113 of the first insulating layer211. A single etching process may be performed to form the first andsecond openings OP1 and OP2. The first and second openings OP1 and OP2may be formed at substantially the same time. Accordingly, a singleopening OP may be formed to include the first and second openings OP1and OP2.

After the preliminary second insulating layer 212′ is removed frominside the first opening OP1 and the second opening OP2 is formed in thepreliminary second insulating layer 212′, the preliminary secondinsulating layer 212′ may be cured. For example, a second insulatinglayer 212 may be formed by curing the preliminary second insulatinglayer 212′ in which the second opening OP2 is formed. For example, thepreliminary second insulating layer 212′ may be provided in a chamber.The chamber may have a temperature in a range of from about 150° C. toabout 200° C. The preliminary second insulating layer 212′ may be cooledto room temperature (e.g., about 25° C.) to obtain the second insulatinglayer 212, which is cured.

The opening OP may at least partially expose each of the chip pad 110,the first sidewall 2113 of the first insulating layer 211, a portion ofthe bottom surface 2111 of the first insulating layer 211, and a secondsidewall 2123 of the second insulating layer 212.

Referring to FIG. 4G, a first barrier metal layer 213 may be formedalong sidewalls of each of the first and second openings OP1 and OP2.The sidewall of the second opening OP2 may correspond to the secondsidewall 2123 of the second insulating layer 212. For example, the firstbarrier metal layer 213 may be formed on each of the chip pads 110,portions of the bottom surface 2111 of the first insulating layer 211,the first sidewall 2113 of the first insulating layer 211, and thesecond sidewall 2123 of the second insulating layer 212, all of whichmay be at least partially exposed to the first and second openings OP1and OP2. The first barrier metal layer 213 may also be formed on abottom surface 2121 of the second insulating layer 212. The firstbarrier metal layer 213 may be formed, for example, using CVD (ChemicalVapor Deposition), ALD (Atomic Layer Deposition), or PVD (Physical VaporDeposition), such as sputtering. For example, the first barrier metallayer 213 may be conformally formed on the bottom surface 2121 of thesecond insulating layer 212.

Referring to FIG. 4H, a first redistribution conductive pattern 214 maybe formed on the first barrier metal layer 213. For example, anelectroplating or electroless plating process may be performed to formthe first redistribution conductive pattern 214 on the first barriermetal layer 213. When an electroplating process is performed to form thefirst redistribution conductive pattern 214 on the first barrier metallayer 213, a seed layer may be formed on a surface of the first barriermetal layer 213. The seed layer may increase uniformity of anelectroplating layer. The seed layer may also provide an initialnucleation site. The first redistribution conductive pattern 214 may atleast partially cover the first barrier metal layer 213. The firstredistribution conductive pattern 214 may at least partially fill eachof the first and second openings OP1 and OP2. The first redistributionconductive pattern 214 may be formed on the bottom surface 2121 (see,e.g., FIG. 4F) of the second insulating layer 212. Thus, the firstbarrier metal layer 213 and the first redistribution conductive pattern214 may be sequentially formed in the first and second openings OP1 andOP2.

Referring to FIGS. 2B and 4I, a planarization process may be performedto at least partially expose the bottom surface 2121 of the secondinsulating layer 212. The planarization process may cause the firstredistribution conductive pattern 214 to have a bottom surface 2141 atsubstantially the same level as that of the bottom surface 2121 of thesecond insulating layer 212. For example, the planarization process maycause the bottom surface 2121 of the second insulating layer 212 to besubstantially coplanar with the bottom surface 2141 of the firstredistribution conductive pattern 214. The bottom surface 2121 of thesecond insulating layer 212 may be in a position corresponding to asurface of the second insulating layer 212, and the bottom surface 2141of the first redistribution conductive pattern 214 may be in a positioncorresponding to a surface of the first redistribution conductivepattern 214.

In some exemplary embodiments of the present inventive concept, theplanarization process may etch the first redistribution conductivepattern 214 and/or the first barrier metal layer 213. For example, theplanarization process may include a chemical etching process. Thechemical etching process may refer to a planarization technique in whicha chemical is used to chemically dissolve and remove the surface of thefirst redistribution conductive pattern 214 and/or the surface of thefirst barrier metal layer 213. According to an exemplary embodiment ofthe present inventive concept, the planarization process may include asurface cutting process. The surface cutting process may refer to aplanarization technique in which a blade is used to physically removethe surface of the first redistribution conductive pattern 214 and/orthe surface of the first barrier metal layer 213. Referring to FIG. 2B,after the planarization process is performed, the bottom surface 2141 ofthe first redistribution conductive pattern 214 may have a surfaceroughness greater than a surface roughness of the bottom surface 2121 ofthe second insulating layer 212. Through the processes discussed above,a first insulation section 210 may be formed to include the firstinsulating layer 211, the second insulating layer 212, the first barriermetal layer 213, and the first redistribution conductive pattern 214.

Referring to FIG. 4J, a second insulation section 220 may be formed onthe first insulation section 210. The second insulation section 220 maybe formed in substantially the same manner as that of the firstinsulation section 210 discussed above with reference to FIGS. 4C to 4I.The second insulation section 220 may include a third insulating layer221, a fourth insulating layer 222, a second redistribution conductivepattern 224, and a second barrier metal layer 223. The third insulatinglayer 221 may be formed on the bottom surface 2141 of the firstredistribution conductive pattern 214 and the bottom surface 2121 of thesecond insulating layer 212. The third insulating layer 221 may beprovided. The third insulating layer 221 may include third openings OP3(see, e.g., FIG. 2A). The third openings OP3 may expose at least aportion of the bottom surface 2141 of the first redistributionconductive pattern 214.

Referring to FIG. 4K, a third insulation section 230 may be formed onthe second insulation section 220. The third insulation section 230 mayinclude a fifth insulating layer 231, a third barrier metal layer 233,and a third redistribution conductive pattern 234. In some exemplaryembodiments of the present inventive concept, a preliminary fifthinsulating layer may be formed on each of the fourth insulating layer222 and a plurality of the second redistribution conductive patterns224.

The preliminary fifth insulating layer may be partially etched to formopenings. The openings of the preliminary fifth insulating layer mayeach at least partially expose the second redistribution conductivepattern 224. The preliminary fifth insulating layer may be cured to formthe fifth insulating layer 231. The third barrier metal layer 233 may beformed on the fifth insulating layer 231. The third barrier metal layer233 may extend along a sidewall of the opening. The sidewall of theopening may be in a position corresponding to a sidewall of the fifthinsulating layer 231. The third barrier metal layer 233 may be formed ona bottom surface of the fifth insulating layer 231.

After the third barrier metal layer 233 is formed, a third mask patternmay be formed on the third barrier metal layer 233. The third maskpattern may be used, for example, to form the third redistributionconductive pattern 234 on the third barrier metal layer 233. The thirdredistribution conductive pattern 234 may protrude from the fifthinsulating layer 231. The third redistribution conductive patter 234 mayalso at least partially fill the openings of the fifth insulating layer231.

The third redistribution conductive pattern 234 may be formed on thethird barrier metal layer 233. The third mask pattern may be removed.After the third mask pattern is removed, the third barrier metal layer233 may be partially removed to have no portion overlapping the thirdredistribution conductive pattern 234.

After the third barrier metal layer 233 is partially removed to have noportion overlapping the third redistribution conductive pattern 234,external terminals 300 may be formed on a bottom surface of theredistribution substrate 200. For example, the external terminals 300may be formed on a plurality of the third redistribution conductivepatterns 234.

Referring to FIG. 4L, after the external terminals 300 are formed on thebottom surface of the redistribution substrate 200, a singulationprocess may be performed, for example, to cut each of the molding layer150 and the redistribution substrate 200. For example, the molding layer150 and the redistribution substrate 200 may be cut along dotted linesshown in FIG. 4L. Accordingly, the molding layer 150 and theredistribution substrate 200 may be separated into unit semiconductorpackages 1.

FIGS. 5A, 5B, 5C, 5D, 5E, 5F, 5G, 5H and 5I are cross-sectional viewsillustrating a method of manufacturing a semiconductor package accordingto an exemplary embodiment of the present inventive concept. FIGS. 5A to5H illustrate a method of manufacturing a unit semiconductor package.Descriptions of components that are substantially the same as those ofthe exemplary embodiments discussed above with reference to FIGS. 4A to4K may be omitted below.

Referring to FIG. 5A, a preliminary first insulating layer 211′ may beformed on a carrier substrate 30. First openings OP1 may be formed inthe preliminary first insulating layer 211′. The first openings OP1 mayat least partially expose the carrier substrate 30.

Referring to FIG. 5B, the preliminary first insulating layer 211′ (see,e.g. FIG. 5A) may be thermally or optically cured. Thus, the carriersubstrate 30 may be provided on the preliminary first insulating layer211′ with a first insulating layer 211 having the first openings OP1 atleast partially exposing the carrier substrate 30.

A preliminary second insulating layer 212′ may be formed on the firstinsulating layer 211. The preliminary second insulating layer 212′ mayat least partially fill the first openings OP1. For example, thepreliminary second insulating layer 212′ may at least partially cover abottom surface 2111 of the first insulating layer 211, and may at leastpartially fill the first openings OP1.

Referring to FIG. 5C, a second opening OP2 may be formed in thepreliminary second insulating layer 212′ (see, e.g., FIG. 5B). Forexample, the second opening OP2 may be formed in the preliminary secondinsulating layer 212′. At substantially the same time, the preliminarysecond insulating layer 212′ may be at least partially removed frominside the first opening OP1. Thus, the bottom surface 2111 of the firstinsulating layer 211 may be at least partially exposed to the secondopening OP2. When the second opening OP2 is formed, a sidewall of thefirst opening OP1 may be at least partially exposed. The formation ofthe second opening OP2 may be performed when the first insulating layer211 is in a cured state and the preliminary second insulating layer 212′is in a non-cured state. After the second opening OP2 is formed, thepreliminary second insulating layer 212′ may be cured to form a secondinsulating layer 212. A plurality of second openings OP2 may be formed.

The first and second openings OP1 and OP2 may at least partially exposeeach of the carrier substrate 30, a first sidewall 2113 of the firstinsulating layer 211, the bottom surface 2111 of the first insulatinglayer 211, and a second sidewall 2123 of the second insulating layer212.

Referring to FIG. 5D, a first barrier metal layer 213 may be formed onthe carrier substrate 30, the first sidewall 2113 (see, e.g., FIG. 5C),the bottom surface 2111 of the first insulating layer 211, and thesecond sidewall 2123 (see, e.g., FIG. 5C), all of which may be at leastpartially exposed by the first and second openings OP1 and OP2. Thefirst barrier metal layer 213 may also be formed on a bottom surface2121 (see, e.g., FIG. 5C) of the second insulating layer 212.

Referring to FIG. 5E, a first redistribution conductive pattern 214 maybe formed on the first barrier metal layer 213. The first redistributionconductive pattern 214 may be positioned over the bottom surface 2121(see, e.g., FIG. 5C) of the second insulating layer 212. The firstredistribution conductive pattern 214 may at least partially cover thefirst barrier metal layer 213, and may at least partially fill the firstand second openings OP1 and OP2. Thus, the first barrier metal layer 213and the first redistribution conductive pattern 214 may be sequentiallyformed in the first and second openings OP1 and OP2.

Referring to FIG. 5F, a planarization process may be performed to atleast partially expose the bottom surface 2121 of the second insulatinglayer 212. For example, the planarization process may include a chemicaletching process. After the planarization process is performed, the firstredistribution conductive pattern 214 may have a bottom surface 2141having a surface roughness greater than a surface roughness of thebottom surface 2121 of the second insulating layer 212 (see, e.g., FIG.2B). Thus, a first insulation section 210 may be formed to include thefirst insulating layer 211, the second insulating layer 212, the firstbarrier metal layer 213, and the first redistribution conductive pattern214.

Referring to FIG. 5G, a second insulation section 220 may be formed onthe first insulation section 210. The second insulation section 220 maybe formed in substantially the same manner as that of the firstinsulation section 210 discussed above with reference to FIGS. 5A to 5E.Referring to FIG. 4K, a third insulation section 230 may be formed onthe second insulation section 220. Accordingly, a redistributionsubstrate 200 may be formed.

In some exemplary embodiments of the present inventive concept, externalterminals 300 may be formed on the redistribution substrate 200.Thereafter, a semiconductor chip 100 may be mounted on theredistribution substrate 200. In some exemplary embodiments of thepresent inventive concept, the semiconductor chip 100 may be mounted onthe redistribution substrate 200. Thereafter, the external terminals 300may be formed on the redistribution substrate 200.

The external terminals 300 may be formed on a plurality of thirdredistribution conductive patterns 234. In such a configuration, theexternal terminals 300 may be electrically connected to each of thefirst, second, and third redistribution conductive patterns 214, 224,and 234. The carrier substrate 30 may be at least partially removed fromthe redistribution substrate 200. For example, the carrier substrate 30may be separated from the first insulating layer 211. Thus, theredistribution substrate 200 may have an at least partially externallyexposed top surface (e.g., a top surface 2112 of the first insulationlayer 211).

Referring to FIG. 5H, after the carrier substrate 30 is separated fromthe redistribution substrate 200, the redistribution substrate 200 maybe turned upside down (e.g., rotated about 180 degrees). After theredistribution substrate 200 is turned upside down, the semiconductorchip 100 may be provided on the top surface 2112 of the redistributionsubstrate 200. In this step, chip pads 110 of the semiconductor chip 100may at least partially vertically overlap a plurality of the firstredistribution conductive patterns 214. The chip pads 110 may beelectrically connected to the first redistribution conductive patterns214, for example, through conductive connection members 130. Theconductive connection member 130 may be a solder balls, or a solderpillar. In some exemplary embodiments of the present inventive concept,the conductive connection member 130 may be provided on the chip pad110. A passivation layer 120 may be provided on a bottom surface of thesemiconductor chip 100. The passivation layer 120 may have openings. Theopenings of the passivation layer 120 may at least partially expose thechip pads 110. The conductive connection members 130 may be electricallyconnected to the chip pads 110, for example, through the openings of thepassivation layer 120.

Referring to FIG. 5I, the molding layer 150 may be formed on the topsurface 2112 of the redistribution substrate 200 including a pluralityof the semiconductor chips 100 on the top surface 2112. The moldinglayer 150 may at least partially cover the semiconductor chips 100 andthe top surface 2112 of the redistribution substrate 200. After themolding layer 150 is formed, a singulation process may be performed suchthat the molding layer 150 and the redistribution substrate 200 may becut along dotted lines shown in FIG. 5I. Thus, the molding layer 150 andthe redistribution substrate 200 may be separated into unitsemiconductor packages 1.

According to some exemplary embodiments of the present inventiveconcept, the barrier metal layer may be formed on the side surface ofthe redistribution conductive pattern, which may increase a lifetime ofthe semiconductor package. The redistribution conductive pattern mayhave a surface in direct contact with the insulating layer, which mayhave a greater surface roughness, which may increase an adhesive forcebetween the redistribution conductive pattern and the insulating layer.

Exemplary embodiments of the present inventive concept are not limitedto the description set forth herein, other effects which have not beenmentioned above will be clearly understood to those skilled in the art.

While the inventive concept has been particularly shown and describedwith reference to exemplary embodiments thereof, it will be understoodby those of ordinary skill in the art that various changes in form anddetail may be made therein without departing from the spirit and scopeof the inventive concept.

What is claimed is:
 1. A semiconductor package, the semiconductor package comprising: a redistribution substrate; a semiconductor chip mounted on the redistribution substrate using a conductive connection member; and an external terminal on a bottom surface of the redistribution substrate, wherein redistribution substrate comprises: a first insulating layer including a first opening; a second insulating layer including a second opening under the first insulating layer, the second opening overlapping the first opening, wherein the second opening has a width greater than a width of the first opening; a first barrier metal layer disposed along a sidewall of the first opening and along a sidewall of the second opening; a first redistribution conductive pattern on the first barrier metal layer, wherein the first redistribution conductive pattern is connected to the conductive connection member; a third insulating layer under the second insulating layer; a pad on the bottom surface of the third insulating layer, and electrically connected to the first redistribution conductive pattern; and a second barrier metal layer positioned between the third insulating layer and the pad, wherein the first redistribution conductive pattern has a surface roughness including protrusions extending in a range of from about 0.01 μm to about 0.5 μm, and the second insulating layer has a surface roughness smaller than the surface roughness of the first redistribution conductive pattern, and wherein the external terminal is provided on the pad.
 2. The semiconductor package of claim 1, further comprising: a fourth insulating layer between the second insulating layer and the third insulating layer, the fourth insulating layer include a third opening; a fifth insulating layer between the fourth insulating layer and the third insulating layer, the fifth insulating layer include a fourth opening overlapping the third opening and the fourth opening has a width greater than a width of the third opening; a third barrier metal layer disposed along a sidewall of the third opening and along a sidewall of the fourth opening; and a second redistribution conductive pattern on the third barrier metal layer.
 3. The semiconductor package of claim 2, wherein, on a boundary between the second insulating layer and the fourth insulating layer, the third opening connected to the second opening, and the third barrier metal layer contact with the first redistribution conductive pattern.
 4. The semiconductor package of claim 2, wherein the second redistribution conductive pattern penetrates the third insulating layer, and wherein, on a boundary between the fifth insulating layer and the third insulating layer, the second redistribution conductive pattern contact with the pad.
 5. The semiconductor package of claim 1, the second opening is positioned in the first opening in a plan view.
 6. The semiconductor package of claim 1, wherein the first redistribution conductive pattern has a surface that is substantially coplanar with a surface of the second insulating layer.
 7. The semiconductor package of claim 1, wherein the first opening penetrates the first insulating layer, and first barrier metal layer contact with the conductive connection member through the first opening.
 8. The semiconductor package of claim 1, wherein the second opening at least partially exposes a sidewall of the second insulating layer, and the first barrier metal layer is formed between the first redistribution conductive pattern and the sidewall of the second insulating layer.
 9. The semiconductor package of claim 1, wherein the first and second insulating layers each comprise one or more of photosensitive polyimide (PSPI), polybenzoxazole (PBO), phenolic polymer, or benzocyclobutene (BCB) polymer.
 10. A semiconductor package, the semiconductor package comprising: a redistribution substrate comprising a first insulation section, a second insulation section and a third insulation section that are sequentially stacked; a semiconductor chip mounted on the redistribution substrate using a conductive connection member; and an external terminal on a bottom surface of the redistribution substrate, wherein each of the second and the third insulation sections comprise: a first insulating layer including a first opening; a second insulating layer on the first insulating layer and including a second opening, wherein the second opening is positioned in the first opening in a plan view; a barrier metal layer disposed along a sidewall of the first opening and along a sidewall of the second opening; and a redistribution conductive pattern on the barrier metal layer, wherein the first insulation section comprises: a third insulating layer under the second insulation section, and a pad penetrating the third insulating layer to electrically connected to the redistribution conductive pattern of the second insulation section, wherein the conductive connection member connects to the redistribution conductive pattern of the third insulation section, and the external terminal connects to the pad of the first insulation section, and wherein, the first insulating layer has a surface roughness including protrusions extending in a range of from about 0.01 μm to about 0.5 μm, and the redistribution conductive pattern has a surface roughness greater than the surface roughness of the first insulating layer.
 11. The semiconductor package of claim 10, wherein the first opening has a width greater than a width of the second opening.
 12. The semiconductor package of claim 10, wherein the redistribution conductive pattern has a surface that is substantially coplanar with a surface of the first insulating layer.
 13. The semiconductor package of claim 10, wherein the first opening at least partially exposes a sidewall of the first insulating layer, and the barrier metal layer is formed between the redistribution conductive pattern and the sidewall of the first insulating layer.
 14. The semiconductor package of claim 10, wherein the second opening of the second insulation section is overlap with the first opening of the third insulation section, and the barrier metal layer of the second insulation section is contact with the redistribution conductive pattern of the third insulation section through the second opening of the second insulation section.
 15. The semiconductor package of claim 10, wherein the first and second insulating layers each comprise one or more of photosensitive polyimide (PSPI), polybenzoxazole (PBO), phenolic polymer, or benzocyclobutene (BCB) polymer.
 16. A semiconductor package, the semiconductor package comprising: a redistribution substrate; a semiconductor chip on the redistribution substrate; and an external terminal on a bottom surface of the redistribution substrate, wherein the redistribution substrate comprises: a first insulating layer including a first opening; a second insulating layer on the first insulating layer and including a second opening, wherein the second opening is positioned in the first opening in a plan view; a first barrier metal layer disposed along a sidewall of the first opening and along a sidewall of the second opening; a first redistribution conductive pattern on the first barrier metal layer; a third insulating layer on a bottom surface of the first insulating layer; and a pad penetrating the third insulating layer and electrically connecting to the first redistribution conductive pattern, wherein the external terminal is provided on the pad, wherein the second insulating layer at least partially covers a chip pad of the semiconductor chip, and the second opening at least partially exposes the chip pad, wherein, inside the second insulating layer, the first barrier metal layer is in contact with the chip pad through the second opening, and wherein the first redistribution conductive pattern has a surface roughness including protrusions extending in a range of from about 0.01 μm to about 0.5 μm, and the first insulating layer has a surface roughness smaller than the surface roughness of the first redistribution conductive pattern.
 17. The semiconductor package of claim 16, wherein the first redistribution conductive pattern has a surface that is substantially coplanar with a surface of the second insulating layer.
 18. The semiconductor package of claim 16, further comprising: a fourth insulating layer between the first insulating layer and the third insulating layer, the fourth insulating layer includes a third opening; a fifth insulating layer between the fourth insulating layer and the first insulating layer, the fifth insulating layer includes a fourth opening positioning in the third opening in a plan view; a second barrier metal layer disposed along a sidewall of the third opening and along a sidewall of the fourth opening; and a second redistribution conductive pattern on the third barrier metal layer.
 19. The semiconductor package of claim 18, wherein the fourth opening is overlap with the first opening, and the second barrier metal layer is contact with the first redistribution conductive pattern through the fourth opening.
 20. The semiconductor package of claim 16, wherein the first and second insulating layers each comprise one or more of photosensitive polyimide (PSPI), polybenzoxazole (PBO), phenolic polymer, or benzocyclobutene (BCB) polymer. 